Social enterprises (SEs) combine economic and social goals and are essential pillars to contribute to a better world. SEs often manage limited resources; wasting some could mean minimizing their social contributions. This study, supported by the theoretical lens of the business model (BM), analyses the modes of uncaptured value in SEs. This qualitative study examines micro and small SEs from the sustainable fashion industry based on ethnographic views and semi-structured interviews. This study contributes to the literature and the managerial field by examining the modes of uncaptured value and their consequences while organizing them in two groups according to the set of decisions and actions of the SEs; presenting a framework that represents stages of the development of SEs according to their relationship with modes of uncaptured value; and, providing a set of valuable knowledge to support the qualification of SEs in better structuring their BMs and practices. Understanding the modes of uncaptured value in the BMs of SEs leverages the value that could be delivered but is not, especially in a context of resource scarcity and social demands.